Author: Andrew Williams
Date: 02:38:59 07/20/00
Go up one level in this thread
On July 19, 2000 at 10:54:14, Dieter Buerssner wrote: >On July 19, 2000 at 09:33:55, Andrew Williams wrote: > >>Here is a position that arose in a game on ICC today (PGN below): >> >>[D] 8/1N6/6p1/2K1k2p/8/1PP5/8/8 w - - acd 11; acn 576768; acs 5; ce 772; fmvn >>60; hmvc 0; id "PostModernist vs Tinker"; pm Kc6 ; pv 60. Kc6 h4 61. Nc5 Kf4 62. >>Kd5 >> >>Notice that my program gives a score of +7.72 after a depth 11 search. What >>happened in fact is that Tinker managed to force home its g-pawn and win. I >>was wondering whether PM missed something here. After a longer search, PM >>prefers Kc4, but it's not clear if White can do better than draw. >> >>I'd be interested in any opinions on this position, either silicon- or >>carbon-generated :-) > >Can't give a carbon generated answer. Yace seems eventually to think this is >draw. > >First column is nodes, second time, third eval. A appended "H" in PV means, that >this move is from the hash (and may be different now, than at the time the >move was searched). In fail low or fail high case, I also show the meaningless >PV, that actually failed. null is a nullmove. Under certain cirumstances, Yace >will do null moves in endgame like poistions at the leaves of the search tree. > >AMD K6-2 300, 4-men and some 5-men EGTBs. > >[...] > > 69406 1.239 281 9. : Nb7d6 h5h4 Nd6c4+ Ke5e4 Kc5b4 h4h3 Nc4d2+ Ke4e3 > Nd2f1+ Ke3e4 (320) > 86883 1.354 283 10t : Nb7d6 h5h4 Nd6c4+ Ke5e4 Kc5b4 h4h3 Nc4d2+ Ke4e3 > Nd2f1+ Ke3e2 Nf1g3+ Ke2d3 (320) > 102986 1.458 283 10. : Nb7d6 h5h4 Nd6c4+ Ke5e4 Kc5b4 h4h3 Nc4d2+ Ke4e3 > Nd2f1+ Ke3e2 Nf1g3+ Ke2d3 (320) >[failed low for Nd6] > 230769 2.100 234 11t+: Kc5c4 h5h4 Nb7c5 Ke5f4 null Kf4e5 b3b4 Ke5f4 > (320) > 246843 2.208 270 11t : Kc5c4 h5h4 Nb7c5 h4h3 Nc5d3+ Ke5f5 Nd3f2 h3h2 > b3b4 g6g5 b4b5 g5g4 (320) > 249441 2.227 271 11t+: Kc5c6 h5h4 Nb7c5 h4h3 Nc5d3+ Ke5f5 c3c4 h3h2 > Nd3f2 g6g5 c4c5 g5g4 (320) > 252477 2.264 271 11t : Kc5c6 h5h4 Nb7c5 h4h3 Nc5d3+ Ke5f5 c3c4 h3h2 > Nd3f2 g6g5 c4c5 g5g4 (320) > 258748 2.314 271 11. : Kc5c6 h5h4 Nb7c5 h4h3 Nc5d3+ Ke5f5 c3c4 h3h2 > Nd3f2 g6g5 c4c5 g5g4 (320) > 314993 2.642 266 12t : Kc5c6 h5h4 Nb7c5 h4h3 Nc5d3+ Ke5f5 b3b4 h3h2 > Nd3f2 g6g5 b4b5 g5g4 b5b6 g4g3 (320) > 360014 2.907 267 12t+: Kc5c4 h5h4 Nb7c5 Ke5f6 null h4h3 Kc4d4 h3h2 > Nc5e4+ Kf6f5 Ne4g3+ Kf5f4H (320) > 397595 3.196 270 12t : Kc5c4 h5h4 Nb7c5 h4h3 Nc5d3+ Ke5f5 Nd3f2 h3h2 > b3b4 g6g5 b4b5 g5g4 b5b6 g4g3 (320) > 497342 3.841 271 12t+: Kc5b5 h5h4 Nb7c5 h4h3 Nc5d3+ Ke5f5 c3c4 h3h2 > Nd3f2 Kf5e5 null Ke5d6 nullH nullHR (320) > 502534 3.896 270 12t-: Kc5b5 h5h4 Nb7c5 h4h3 Nc5d3+ Ke5f5 c3c4 h3h2 > Nd3f2 Kf5f4 c4c5 Kf4f3H Kb5b6H Kf3xf2H c5c6H (0) > 528783 4.063 271 12t+: Kc5b4 h5h4 Nb7c5 h4h3 Nc5d3+ Ke5f5 c3c4 h3h2 > Nd3f2 Kf5e5 null Ke5d6 nullH nullHR (320) > 534420 4.116 272 12t : Kc5b4 h5h4 Nb7c5 h4h3 Nc5d3+ Ke5f5 c3c4 h3h2 > Nd3f2 Kf5f4 c4c5 Kf4f3 Nf2h1 Kf3e4 (320) > 537364 4.144 272 12. : Kc5b4 h5h4 Nb7c5 h4h3 Nc5d3+ Ke5f5 c3c4 h3h2 > Nd3f2 Kf5f4 c4c5 Kf4f3 Nf2h1 Kf3e4 (320) > 1317153 8.064 222 13--: Kc5b4 h5h4 Nb7c5 Ke5f4 Nc5d3+ Kf4g3 Nd3f4 Kg3xf4 > Kb4b5 null c3c4 (0) > 1596859 9.408 0 13t : Kc5b4 h5h4 Nb7c5 Ke5f4 Nc5e6+ Kf4g4 Ne6c5 Kg4f4 > (320) > 1635421 9.622 1 13t+: Kc5c4 h5h4 Nb7c5 Ke5f4 Nc5d3+ Kf4g3 Kc4d4 h4h3 > Kd4e3 h3h2 Nd3f2 Kg3g2 c3c4 h2h1=N (100) > 1733738 10.10 178 13t : Kc5c4 h5h4 Nb7c5 Ke5f4 Kc4d3 h4h3 Kd3e2 h3h2 > Nc5d3+ Kf4g3 Nd3f2 Kg3g2 c3c4 h2h1=Q Nf2xh1 > Kg2xh1 (100) > 1955308 11.32 178 13. : Kc5c4 h5h4 Nb7c5 Ke5f4 Kc4d3 h4h3 Kd3e2 h3h2 > Nc5d3+ Kf4g3 Nd3f2 Kg3g2 c3c4 h2h1=Q Nf2xh1 > Kg2xh1 (100) >[...] > 7847121 47.06 184 17. : Kc5c4 h5h4 Nb7c5 Ke5f4 Kc4d3 h4h3 Kd3e2 h3h2 > Nc5d3+ Kf4g3 Nd3f2 Kg3g2 c3c4 g6g5 c4c5 h2h1=Q > Nf2xh1 Kg2xh1 b3b4 (100) > 18018452 101.7 134 18--: Kc5c4 h5h4 Nb7c5 Ke5f4 Kc4d3 h4h3 Kd3e2 h3h2 > c3c4 h2h1=Q Nc5e6+ Kf4e4 Ne6g5+ Ke4e5 b3b4 null > Ke2f2 (-580) > 23191941 128.7 -9 18t : Kc5c4 h5h4 Nb7c5 Ke5f4 Kc4d3 h4h3 Kd3e2 h3h2 > Nc5d3+ Kf4g3 Nd3f2 Kg3g2 c3c4 g6g5 c4c5 g5g4 > Nf2h1 Kg2xh1 c5c6 (0) > 31352435 176.0 -9 18. : Kc5c4 h5h4 Nb7c5 Ke5f4 Kc4d3 h4h3 Kd3e2 h3h2 > Nc5d3+ Kf4g3 Nd3f2 Kg3g2 c3c4 g6g5 c4c5 g5g4 > Nf2h1 Kg2xh1 c5c6 (0) > 33191885 189.2 41 19++: Kc5c4 h5h4 Nb7c5 Ke5f4 Kc4d3 h4h3 Kd3e2 Kf4g3 > Nc5d3 Kg3h2 null g6g5 null g5g4 (320) > 34585251 198.2 100 19t : Kc5c4 h5h4 Nb7c5 Ke5f4 Kc4d3 h4h3 Kd3e2 Kf4g3 > Nc5d3 h3h2 Nd3f2 g6g5 Ke2f1 g5g4 c3c4 Kg3f3 > Nf2h1 g4g3 Nh1xg3 Kf3xg3 Kf1e2H h2h1=QH <HT> > (-800) > 39064610 231.1 100 19. : Kc5c4 h5h4 Nb7c5 Ke5f4 Kc4d3 h4h3 Kd3e2 Kf4g3 > Nc5d3 h3h2 Nd3f2 g6g5 Ke2f1 g5g4 c3c4 Kg3f3 > Nf2h1 g4g3 Nh1xg3 Kf3xg3 Kf1e2 h2h1=Q <HT> (-800) > 116492946 777.1 50 20--: Kc5c4 h5h4 Nb7c5 Ke5f4 Kc4d3 h4h3 Kd3e2 Kf4g3 > Nc5d3 h3h2 Nd3f2 g6g5 Ke2f1 g5g4 c3c4 Kg3f3 > Nf2h1 g4g3 Nh1f2 g3xf2 c4c5 (0) > 120786319 815.6 150 20++: Kc5c4 h5h4 Nb7c5 Ke5f4 Kc4d3 h4h3 Kd3e2 Kf4g3 > Nc5d3 h3h2 Nd3f2 g6g5 Ke2f1 g5g4 b3b4 Kg3f3 null > Kf3g3 (320) > 126925181 860.3 0 20t : Kc5c4 h5h4 Nb7c5 Ke5f4 Kc4d3 h4h3 Kd3e2 Kf4g3 > Nc5d3 h3h2 Nd3f2 g6g5 Ke2f1 g5g4 Nf2e4+ Kg3f3 > Ne4g5+ Kf3g3 Ng5e4+ (320) > 148416525 1039.2 0 20. : Kc5c4 h5h4 Nb7c5 Ke5f4 Kc4d3 h4h3 Kd3e2 Kf4g3 > Nc5d3 h3h2 Nd3f2 g6g5 Ke2f1 g5g4 Nf2e4+ Kg3f3 > Ne4g5+ Kf3g3 Ng5e4+ (320) > >Regards, >Dieter Hi Dieter, Last night I got my program to have a look at the position after 60. Kc4 h4 It seems that Black wins in that position. It looks like the only saving move is 60. Nd8! which leads to a draw. See Dann Corbit's post for crafty's output. Cheers Andrew
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